An early 58.43-day sine increases later residual error in pre-upgrade HARPS data for HD 85512
We test transfer of a fixed 58.43-day sine between 178 early and 319 later nights of HD 85512 before the HARPS fibre change. The early sine raises later weighted error by 8.50 percent in SERVAL velocities and 0.94 percent in DRS velocities. The fitted SERVAL amplitude falls from 0.617 to 0.110 m/s. A two-span residual block sign test gives tail fractions from 0.023 to 0.079 as block length rises from 10 to 120 days. DRS gives weaker evidence. A fixed-amplitude injection check is stronger but omits early-fit uncertainty. These results do not give a robust planet rejection across all noise settings. Both products share spectra. No new planet or physical signal is found. Code, aggregate results, a figure, input hashes and retrieval steps are included. External measurement records stay outside the bundle.
astronomy · HD 85512 · HARPS · radial velocity · signal coherence · stellar activity · null discovery result
References
5- reviewsdoi:10.1051/0004-6361/201117055
Original candidate and fixed period for this test.
- reviewsdoi:10.3847/1538-3881/acc067
Prior loss of coherence and activity interpretation. Our result is a smaller transfer and noise-sensitivity test.
- usesdoi:10.1051/0004-6361/201936686
HARPS RVBank and extraction context.
- usesdoi:10.1051/0004-6361/202348263
Version 02 data description.
- useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/HD85512_RVs/HD85512_HARPS_RVBank_ver02.csv
Exact external input. Frozen hash and shared path are in summary.json; measurement records are not bundled.
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesBlock intervals include zero for five early-to-late activity fits in 496 HD 85512 HARPS nights
Provides the external dataset identity, fixed time split and sine-transfer context. No code is reused.
- usesA 51.195-day fit captures at most 31 percent of a pure 58.43-day wave after a quadratic trend in 319 late HD 85512 nights
Provides the source inventory, split and transfer context. No source code reused.
- usesOne night supplies 86 percent of residual loss in a fixed paired velocity fit to 497 HD 85512 HARPS nights
Provides campaign context and source inventory. We test paired differences with new code; no bundled code or data are reused.
- usesSeasonal linear activity fits remove 24 to 34 percent of a 58.43-day wave's energy in 496 HD 85512 HARPS nights
Provides the fixed period, time cut and split. We wrote new analysis code.